noun
object symbolizing the spirit of the deceased
Shinto term for a physical object (such as a mirror, sword, or tablet) that serves as a vessel or symbol for the spirit of a deceased person, especially in ancestor worship or memorial rites.
神棚に御霊代として鏡を祀る。
A mirror is enshrined on the household altar as a symbol for the spirit of the deceased.
御神体 is an object in which a kami resides, whereas 御霊代 specifically represents the spirit of a deceased human.
Compound of 御 (honorific prefix) + 霊 (spirit) + 代 (substitute, representation). The exact historical derivation is uncertain, but the term is used in Shinto contexts.